The Journey of Oxygen: How Your Body Uses Every Breath
Inhaled oxygen travels:
- Inhalation: Air enters nose/mouth → trachea → bronchi → bronchioles.
- Gas exchange: Bronchioles end in alveoli surrounded by capillaries. Oxygen diffuses into blood.
- Cellular respiration: Oxygen used by cells to convert glucose into energy (ATP). Essential for life.
Without oxygen, cells cannot produce energy and death occurs rapidly.
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